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I. Association areas, which are mainly m...

I. Association areas, which are mainly motor in function, are responsible for functions like intersensory associations, memory, and communication.
II. Midbrain and hindbrain forms the brain stem.
III. The ciliary body itself continues forward to form a pigmented and opaque structure- iris.
IV. The membranous labyrinth is filled with a fluid called endolymph.
How many of the given statements are correct?

A

Four

B

Three

C

Two

D

One

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the given statements are correct, let's analyze each statement step by step. ### Step 1: Analyze Statement I **Statement I:** "Association areas, which are mainly motor in function, are responsible for functions like intersensory associations, memory, and communication." - **Analysis:** Association areas in the brain are primarily involved in integrating sensory information and higher cognitive functions. While they do play a role in motor functions, they are not mainly motor in function. The primary motor cortex is responsible for motor functions, while association areas are more about sensory integration and cognitive processes. - **Conclusion:** This statement is **incorrect**. ### Step 2: Analyze Statement II **Statement II:** "Midbrain and hindbrain forms the brain stem." - **Analysis:** The brain stem is indeed composed of the midbrain, pons, and medulla oblongata (which is part of the hindbrain). Therefore, the midbrain and hindbrain together do contribute to the structure of the brain stem. - **Conclusion:** This statement is **correct**. ### Step 3: Analyze Statement III **Statement III:** "The ciliary body itself continues forward to form a pigmented and opaque structure - iris." - **Analysis:** The ciliary body is part of the eye and does indeed continue forward to form the iris, which is the colored part of the eye. The iris is responsible for controlling the size of the pupil and thus the amount of light that enters the eye. - **Conclusion:** This statement is **correct**. ### Step 4: Analyze Statement IV **Statement IV:** "The membranous labyrinth is filled with a fluid called endolymph." - **Analysis:** The membranous labyrinth is a part of the inner ear and is indeed filled with a fluid known as endolymph. This fluid plays a crucial role in the functioning of the auditory and vestibular systems. - **Conclusion:** This statement is **correct**. ### Final Conclusion Now, let's summarize the correctness of each statement: 1. Statement I: Incorrect 2. Statement II: Correct 3. Statement III: Correct 4. Statement IV: Correct Thus, out of the four statements, **three statements are correct**. ### Answer **The number of correct statements is 3.** ---
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